Vehicle roller-jack.



A, C. HOPKINS.

VEHtCLE ROLLER JACK.

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A. C. HOPKINS,

VEHICLE ROLLER JACK.

APPLlcArioN min APR, 29, |918.

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ARTHUR C. HOPKINS, 0F MINNEAPOLIS, MINNESOTA, ASSIGNOR T0 MID-WEST MAN U1 FACTURING COMPANY, Gl? SIOUX FALLS, SOUTH ISAKQT, A CORPORATION.

'VEHICLE ROLLER-JACK.

Leconte.

speci-ocation tieners Patent.

Patented Got. l, illl.

To all whom 'it may concern.:

Be it known that I, ARTHUR C. HOPKINS, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Vehicle Roller-Jacks, of which the following is a specification.

This :invention relates to an improvement in vehicle roller jacks, and has for one of its objects to provide such a construction that stresses directed to the operating parts Will be adequately sustained when lifting" com paratively heavy loads. Another object is to provide 'su'cli a mountingr for the standard or lifting-post that it will be limited to a vertical movement. rthe invention also includes a flexible strand or cable as a substitute for levers, so that excessive Weight of parts may be avoided and economy in mano tacture1 may be attained, and such an arrangement for the cable and frame that they will lie closely adjacentto the floor to be unobtrusive.

With the foregoing objects in view and others to be mentioned hereinafter the in vention presents a novel construction, combination and arrangement or parts as described herein and claimed, and as illustrated in the accompanying drawing, Wherein,

Figure l is a broken the vehicle roller being removed and the axle being in section. Fig. 2 is a broken away view of roller jack in longitudinal section. Fig. 3 is a plan view of the vehicle roller jack. Fig. l is a transverse section on line Jb-4l of Fig. 3, the swivel being omitted. Fig. 5 is a sectional' view showing the mounting e, pullegjilon a caster-rail. Fig. 5 is adetail showing the preferred pivotal mounting of the hand-levier on the frame and the mounting of the rack bar upon the hand lever.

Referring to the drawing numeral 7 `indicates an axle, upon 'its ends being journaled the pair of Wheels 8. l provide a casting 9 having parts o and wlncli project, respcctively, above and below the axle, the part a being rovided with a pan' of opposed, rearward y projecting arms 10 for a mountaway side view of 'ing of a shaft l1 for journaled bearingsofa pulley 12. At 13 is indicated a pair or jack, one ot' the Wheels /wardly vided for the lower 'which carry a shaft 14 for a mounting of the pulley l5, the arms 13 being' .somewhat longer than arms 10, so that the pulley l5 may be disposed in a plane outwardly or rearwardly of the pulley l2.

The casting 9 is inade rigid with the axle by means of suit-able keys c (Fig, 2) and it is --provided with aV rectilinear channel 16 openin on its upper end.. Seated in the clianne is a standard or post 17 substantially of l.shape, its upper end being provided with a swivel 18 for engaging a load to be elevated, the lower end of the casting being provided vritha base-plate 19 (Fig. 2) to limit a downward sliding movement of the standard, an outward swinging move nient of the standard being prevented by a detent-plate 20 which is provided for the casting.

Means are provided to maintain the channel and the standard in a vertical position at all times, so that a load may be elevated Without undue vibration, this being accomplished, in part by a rearwardly projecting frame 21 consisting of n pair of side bars, best shown in Fig. 3, each preferably being rectilinear with upwardly projecting inner end-portions d for a rigid mounting on the eide, preferably by ineens of keys e as shown in Fig. 1.

@n account of the keyed connection as described, the parts may be conveniently manufactured and assembled. The frame, near .itsrear end, is supported upon casters 22, and is disposed normally in a horizontal position, and on account of the construction as described, the channel 16 are maintained at right angles to the frame.

Numeral 23 indicates ay transverse bar or rail which is suitably secured to the rear-. Wardly c cnvergentside-bars of .the frame 21. lt has end-portions which reject outof the frame 2l to provi e a mount-` ing for the casters, and it provides a support, as best shown in Figs. 2 'and 5, for a mounting of a third pulley 24.

Numeral 25 pivotal mounting for its lower end being provided by the Wristlpin 26 which connecte..

the rear endo the' side-bars of the frame 21, said lever being provided near its lower end Witha Vmi'rwid rack bar 2'?.

Numeral 28 indicating@ flexible strand or part of the casting and the post indicates a hand-lever the v normally in eng-agement with the teeth of lli Zll

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'end of the standard 17, Said ealile being in engagement with the pulleys l2, .lll und 'lllie puwl 29 is mounted upon a piu 30 car-- ried by tliefraine, aud is provided between its ende willi a treuil-plate 3l. The puwl is the rack-oar by means oi ite Spring 32, the lower end of the Spring beingr Supported upon tlie chair 33 carried by the piu 526, the upper part of the chair being dispersed upon the side-bars of the freine Q1.

llt will be seen that llie operating parte :for moving the post l? are diepoeed at e, cousidernble distance, comparatively, from the wheels 8, this feature being of great ailvantege Since the head oi tlie swivel '1.8 may be disposed at the middle of u load having e considennlnle area, and .it will. be noted. that the horizontal freine7 by the construction de scribed, ie disposed at all tiniee closely adjeA cent to the floor., the operation of the pulley 2l maintaining the cable in the plane oli the frame, so that tlieee parte will not be obh trusive.

lin oyLiieration7 il' the luind lever is moved to permit the pawl to eugene the eud'of a tooth of the rack-bar'. the pewl.l by moving tlio tread-plate, may be disengaged from the rack-liar. .iin operator, by u rearward movenient of the hand-lever, tney then cause an upwurd movement oli' the standard ll' for lifting a loud, the pawl engaging and Sliding on the teeth in a well known menner to tn position shown in llig. l.

It will loe eppreciuied that the use of e cable, aeshown eiii'ccee a saying in tlie cX- pense of manufacture und provides; com paretively, n lighter structure, and Since tlie cable ie maintained in tlie plane of the heli zontel eide bers it ie of particular nilvantagge for communicating o movement to the vertieel standard from the Swinging" movement of tlie bend-lever.

What l clniin as my invention and, .desire lo secure by Letters Potent iS- l. ln e vel'iiele roller gieelt, en enfle honing wlieele journeled thereon, e casting. projectq ing unove und. below end keyed on the elile und linving n rectilinear channel opening on its upper end, n atender provided with u. swivel end dispoeed in. Suid channel, a rearwurdly projecting' lierinontulifr ine keyed on the axle and imposed et rig-lit englesto tlie channel, e pulley honing jonrneled beni`- inge on. en upper perl; ci the casting reen wardly of the channel, a pulley having journaled bearings on u lower part of the casting rearwardly of the channel, und u, cable en gaging the pulleys and `coiniected with. the lower end of the standard endbeing mov el mennen jack, a. cantine; leav-y .1 pmu' .f meten ypiu Wheels? a peil ci rearwardly projecting sidebars acli lia ving1 i tween Said farine t the eenling. i nant rd in the. channel, pnl-- leye haring ournuled bearings in enid reuiu e inner end diepoed bewardlv in'o'uiectiugg urine; a. flexible Strand connected willi tlie standard end eng-:aging the pulleys, und ai liemllei'cr connected 'with the Strend, sai-d luuuillerer liariigjourneled bearings in and neer the ruiter ende of the rearwardly projec'ling eidelnure for moving the flexible strand tor elevating; theStandardo 3. ln a vehicle roller jeek, e casting pio vided willi rearwardly projecting arnis zirranged in pairs, said casting being provided with wheels und formed with a rectilinear channel, n standard iu the channel, a pair of rearwardly projecting, convergent side bare each having its inner end disposed. in e plane between e wheel and Iquid rearwardly projecting arme and hui/ing; a rigid connection with said casting, pulleys having jourueled. bearing@ in seid rearwardly.projecting arms, and e movelile strand engaging the standard and pulleys for moving Suid standard.

Al. ln a, vehicle roller jack, :i casting naving a channel and provided with wheels and also leuning :repair oi upper, rearwardly projecting arms und u pair of lower, rearwardly projecting arms, u pulley having journaled hearings in the pair or upper ermee, a pulley a 'wheel sind keyed on' lill llll

Zilli? having journaled liieeringe in tlie peir ein lower infine, e etendard in, tile channel. of

said costing, e :freine coneisting of upuir of rectilineer sidi-:bere connected with and projeeting rearwardly from tlieensting, pair et oesters lor seid trarne, ineens tomaintein the freine at rig'lit englfe to Seid cliennel, o cable engeging seid pulleys sind connected wil-li tlie Standard., a movable lever provided loot-Ween its ende with o curved raclrlliur end llt? connected with the opposite end of tlie eelile,

a, .ellensp'enning the eicleliars of the freine,

e paw-l provided between ite eids with a treeilplcte, e spring; on tire che r for censing norrnel engegeinenl; of the pewl with tlie curved ruck-berm and e tliiiol pulley engaging' the cable Hfor. d the plane of the frame.

ln testimony whereof, .l lieve ulined my signature in presence of two witneeeee,

ARTHUR C. llPliCl'NS.

Witnesses:

An'rnnn ll. vonune, linnen'. .A Swinnen,

inteining the ouille in 

